<h3>1.描述</h3>
<p>校验</p>
<h3>2.示例</h3>
<p>(2.1)blur校验</p>
<textarea [tiValidation]="validation" tiRequired tiMaxLength="8" tiTextarea [placeholder]="placeholder" [(ngModel)]="value"></textarea>

<p>(2.2)及时校验</p>
<textarea tiValidation tiTextarea tiRequired maxlength="100" [placeholder]="placeholder" [(ngModel)]="value1"></textarea>
